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Abstract

A method of calibrating an image acquiring device which is arranged at a vehicle at an installation height, assumes a provisional value for the installation height and a defined path length in a road plane. The measurement path is projected onto the image plane by means of a perspective projection using the provisional value of the installation height in order to determine measurement positions in the image which correspond to a path start and to a path end of the measurement path. An object located at two measurement positions at two different times is identified in consecutively acquired images. A calculated path length of the measurement path is determined from the time difference between the different times and the speed of the motor vehicle. An actual value for the installation height is determined using a comparison of the defined path length with the calculated path length.

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